The potent, smokable hallucinogen – known back in the ’70s and ’80s as “angel dust” – sold for $550 a liquid ounce, enough to dip “dozens and dozens” of cigarettes, cops said.

News of the PCP sales was made public yesterday, as authorities announced indictments of 43 drug dealers and three gun dealers operating out of three Harlem housing projects.

It was unusual to see the substance available on the streets, authorities said. PCP has traditionally been viewed by law enforcement as a “boutique drug,” available in very few places to a limited clientele.

The drug was being sold by 18 members of the “King Towers Gang,” prosecutors said. The group also sold crack cocaine, and netted about $1 million a year, they said.